A two-stage piercing apparatus for maintaining a coating continuity

Abstract

The application is a two-stage punching device for maintaining coating continuity, comprising a support, which is provided with a cutter for cutting the coating at the punching position, a punch for punching the coating plate whose coating has been cut, a punching oil cylinder for driving the cutter and punch to lift, a conversion assembly for driving the cutter and punch to move so as to alternately face the punching position, a supporting plate arranged horizontally and below the cutter, and a supporting column below the supporting plate and driven to lift by a lifting oil cylinder, wherein the upper end of the supporting column is inserted into the avoiding hole when the cutter works, and the upper end surface of the supporting column is flush with the upper end surface of the supporting plate; and the supporting column is away from the coating plate when the punch works. By arranging the cylindrical cutter, the coating at the punching position is cut before punching, so that the coating is in the cut state when the punch punches, and will not be broken due to stress concentration in the punching process, thereby effectively solving the problem of coating breakage in the traditional punching process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of punching device, and particularly relates to a two-stage punching device for maintaining continuity of coating. BACKGROUND

[0002] The traditional punching process of the coated plate usually adopts the upward coating mode, that is, the punch head punches the coated plate from the upper side. In this process, the coated plate is first bent downward to adapt to the shape and punching force of the punch head. With the downward pressing of the punch head, the coating material outside the punch head will extend along with the deformation of the plate material. This extension is a natural response of the coating material in the punching process, aiming to maintain consistency with the base material.

[0003] However, when the punch is formed, the extended coating material will be broken (see Figure 13 ). This is because the stress concentration generated in the punching process and the characteristics of the coating material itself cause it to break due to excessive deformation. More seriously, the extended coating will rapidly contract in the case of sudden loss of pulling force. This rapid contraction not only aggravates the breaking phenomenon of the coating, but also may cause the bonding force between the coating and the base material to weaken, and even cause the coating and the base material to separate (see Figure 14 ).

[0004] The phenomenon of coating breakage or separation from the base material not only affects the appearance quality of the coated plate, but also seriously weakens its corrosion resistance. The coating damage at the punch hole exposes the base material directly to the environment, making it easy to be eroded by corrosion media such as water and oxygen, thereby causing the punched plate to easily rust. This not only shortens the service life of the coated plate, but also increases the maintenance cost and replacement frequency.

[0005] Therefore, how to improve the punching process of the coated plate to avoid the phenomenon of coating breakage or separation from the plate, improve the quality and service life of the product, has become an urgent problem to be solved by those skilled in the art. SUMMARY

[0006] To solve the technical problems in the background art, the present application discloses a two-stage punching device for maintaining continuity of coating.

[0007] The present application provides a two-stage punching device for maintaining continuity of coating, which is used for punching of a coated plate. The coated plate is composed of a base material and a coating covering one side of the base material. The two-stage punching device comprises a support, and the support is provided with:

[0008] a cutting knife in the shape of a cylinder, the lower end of the cutting knife is provided with a recessed accommodating cavity, so that the cutting edge of the lower end of the cutting knife forms a V shape, and the inner side surface of the cutting edge forms an upward inclined surface for cutting the coating at the punch hole;

[0009] a punch head for punching the coated plate whose coating has been cut, so that the punch is formed;

[0010] The stamping cylinder is used to drive the cutting blade and punch to rise and fall;

[0011] A conversion assembly is used to drive the cutter and punch to move alternately towards the punching position;

[0012] The support plate is arranged horizontally and located below the cutter. The support plate has clearance holes of the same diameter and coaxiality as the punch holes.

[0013] The support column is located below the pallet and is driven to rise and fall by a lifting cylinder. When the cutter is working, the upper end of the support column is inserted into the clearance hole, and the upper end face of the support column is flush with the upper end face of the pallet. When the punch is working, the support column is moved away from the coated plate.

[0014] The beneficial effects of the above configuration are as follows: 1. By using a cylindrical cutter, the coating at the punching location is cut off before punching. Thus, the coating is already cut off when the punch performs the punching, preventing breakage due to stress concentration during the punching process, effectively solving the problem of coating breakage in traditional punching processes. 2. After the cutter cuts the coating, the punch performs the punching, avoiding the phenomenon of the coating separating from the substrate due to rapid shrinkage during the punching process. 3. Because the cutter exerts downward pressure on the coated plate during cutting, the support column supports the coated plate during cutting, preventing the coated plate from sinking downwards during cutting. 4. The cutter and punch work alternately under the action of the conversion assembly. 5. The process of alternating disassembly and assembly of the cutter and punch is avoided, making the punching process more efficient and stable; 6. The diameter of the clearance hole is set to match the diameter of the punch hole, so that the part around the punch hole will not sink downwards when the punch is cutting, maintaining the structural stability of the coated plate; 7. The V-shaped blade design makes the cutting edge sharper, which can accurately cut the coating material before punching. This precise cutting method reduces the damage to the coating during the cutting process and avoids unnecessary coating cracking or tearing, thereby ensuring the integrity of the coating; 8. Compared with other blade shapes, the V-shaped blade can better disperse stress during cutting and reduce stress concentration, which helps to reduce the risk of the coating breaking due to excessive stress during the cutting process.

[0015] The conversion assembly specifically includes: a horizontally arranged tool mounting plate, with the cutter and punch mounted on the lower side of the tool mounting plate; a lifting frame driven by a hydraulic cylinder is provided on the bracket, and a linear guide rail is installed on the lower side of the lifting frame; the upper end face of the tool mounting plate is fixedly connected to the slider in the linear guide rail; the tool mounting plate is driven to move by a horizontal drive assembly.

[0016] Since the coating has ductility, during the cutting process of the cutter, the coating will be stretched when the cutter cuts downward, based on this, the further improvement lies in that the outer side of the cutter is sleeved with a pressing sleeve, the inner side wall of the pressing sleeve is attached to the outer side wall of the cutter; the pressing sleeve is elastically connected with the cutter mounting plate through a stretching spring, so that it can be displaced in the vertical direction; when the cutter cuts the coating plate, the pressing sleeve and the coating plate generate pressure. In this way, when the cutter cuts downward, the coating around the punching hole is pressed tightly by the pressing sleeve, so that the stretching phenomenon will not occur.

[0017] Since the stress end face of the coating plate is pressed and plastically deformed when the punch punches, the upper end edge of the punching hole generates a certain arc, forming an arc surface, and the arc surface will be separated from the coating and exposed to the outdoor environment and rusted, based on this, the further improvement lies in that the lower end of the inner hole of the pressing sleeve is provided with an inner chamfer. The setting of the inner chamfer makes the coating in the range of the inner chamfer not be pressed by the pressing sleeve, when the arc surface is formed, the coating in the range of the inner chamfer will deform and still adhere to the arc surface; and the range of the arc surface is small, and the deformation amplitude of the coating is also small, so that the phenomenon of breaking or separating from the base material will not occur.

[0018] The conventional connection structure of the pressing sleeve and the stretching spring is that a connecting shaft is arranged, the lower end of the connecting shaft is fixedly connected with the pressing sleeve, the upper end of the connecting shaft passes through the cutter mounting plate upwardly and is locked by a nut; the stretching spring is sleeved on the connecting shaft, the upper end of the stretching spring abuts against the cutter mounting plate, and the lower end of the stretching spring abuts against the pressing sleeve; when the pressing sleeve is lowered and resisted, the connecting shaft will move upwardly; this structure needs enough space between the cutter mounting plate and the lifting frame, so that the connecting shaft will not be blocked when it moves upwardly, thus the height of the present application is higher, the cost is increased, and the space between the cutter mounting plate and the lifting frame is occupied; when other components need to be arranged between the cutter mounting plate and the lifting frame, the connecting shaft will be blocked, based on this, the further improvement lies in that the outer side wall of the pressing sleeve is provided with two symmetrical, vertically arranged mounting sleeves with upward openings, the mounting sleeves are provided with telescopic rods; the lower end of the telescopic rod is fixedly connected with the bottom of the mounting sleeve, and the upper end of the telescopic rod is fixedly connected with the cutter mounting plate; the stretching spring is arranged in the telescopic rod.

[0019] When the cutting knife and the punch are pressed down, the direction of the pressing force of the stamping oil cylinder is staggered with the slide block, which will cause the cutting tool mounting plate to be unevenly stressed and bent; moreover, the pressure between the slide block and the slide rail is large at one end and small at the other end, which will also cause the slide block to be damaged; in addition, the pressure generated by the stamping oil cylinder will act on the linear guide rail, making the linear guide rail more prone to damage. Based on this, the further improvement is that the upper end of the cutting tool mounting plate is provided with a jacking post; the lower end of the jacking post is fixedly connected with the upper end face of the cutting tool mounting plate, and the upper end is in contact with the lower end face of the lifting frame; the jacking post is provided with four, two of which are close to the cutting knife and symmetrically distributed relative to the axis of the cutting knife, and the remaining two are close to the punch and symmetrically distributed relative to the punch. In this way, the jacking post becomes the stress point and directly transmits the pressure from the lifting frame to the cutting tool mounting plate, which can avoid the damage of the linear guide rail under pressure; moreover, the setting of the position of the jacking post makes the cutting tool mounting plate evenly stressed and not bent.

[0020] When the working positions of the cutting knife and the punch are switched, the jacking post will slide between the lifting frame to connect or disconnect the lifting frame. In this way, not only will it cause wear and tear, but also when the jacking post is connected to the lifting frame again after being disconnected, it will be blocked by the lifting frame due to the position accuracy. Based on this, the further improvement is that the jacking post comprises a post body, and a semispherical, open vertical upward groove is arranged at the upper end of the post body; a same-diameter rolling ball is installed in the groove; the upper end of the rolling ball is in contact with the lifting frame.

[0021] If the lifting oil cylinder is vertically arranged to directly drive the support column to lift, it will occupy more vertical space, resulting in a higher height of the device of the application, and when the cutting knife cuts, the support column is easily moved downward under pressure, losing its supporting effect. Based on this, the further improvement is that the lower end of the support column is provided with a first guide surface which is arranged obliquely relative to the horizontal plane; the lifting oil cylinder is horizontally arranged, and its driving end is connected with a driving block which is provided with a second guide surface with the same slope as the first guide surface; the part of the support column provided with the first guide surface has a radial projection in the shape of a right-angled trapezoid; the driving block is in the shape of a right-angled trapezoid; when the driving block moves towards the support column and the first guide surface and the second guide surface are connected, the support column rises; when the driving block moves towards the support column and moves to the point where the first guide surface and the second guide surface are disconnected, the upper end face of the driving block is connected with the lower end face of the support column, at which time the upper end face of the support column is flush with the upper end face of the supporting plate.

[0022] To improve the stability of the lifting of the support column, the further design is that the lower end of the support frame is provided with a vertically arranged guide cylinder, and the support column is inserted into the guide cylinder; the lower part of the guide cylinder is provided with a U-shaped insertion slot with the opening facing downward; and the driving block is inserted into the insertion slot. In this way, the guide cylinder is not only used for guiding the lifting of the support column, but also used for guiding the movement of the driving block, making the lifting of the support column more stable.

[0023] When the punch is punched, the punched-off part of the coating plate will fall on the upper end face of the guide cylinder, and manual cleaning is needed before the next operation, which will affect the production efficiency, based on this, the further improvement is that the upper end face of the guide cylinder is arranged to be inclined relative to the horizontal plane; the upper end face of the guide cylinder is also hinged with a cover plate; the cover plate is turned to realize the plugging or opening of the upper end face of the guide cylinder; when the cover plate is closed, the upper end face of the guide cylinder is plugged, and the cover plate is also arranged to be inclined. By such arrangement, the cut material will automatically fall to the outside of the guide cylinder under the guidance of the cover plate, and will not fall on the upper end face of the guide cylinder, nor will it be stuck in the upper end of the inner hole of the guide cylinder, thereby saving manual operation and improving production efficiency.

[0024] The beneficial effects of the present application are: 1. The present application sets a cylindrical cutter, which cuts the coating at the punching position before punching; in this way, when the punch is punched, the coating is already cut off, and will not break due to stress concentration during the punching process, thereby effectively solving the problem of coating breakage in the traditional punching process; 2. After the cutter cuts off the coating, the punch is punched again, avoiding the phenomenon that the coating is separated from the base material due to rapid shrinkage during the punching process; 3. Since the cutter cuts, it will form a downward pressure on the coating plate, so the support column supports the coating plate during cutting, thereby avoiding the phenomenon that the coating plate is depressed downward during cutting; 4. The cutter and the punch work alternately under the action of the conversion assembly, avoiding the process of disassembling and assembling the cutter and the punch alternately, making the punching process more efficient and stable; 5. The diameter of the avoiding hole is set to be consistent with the diameter of the punching hole, so that the part around the punching hole will not be depressed downward when the punch is punched, maintaining the stability of the structure of the coating plate; 6. The design of the V-shaped blade makes the cutting edge more sharp, which can accurately cut off the coating material before punching. This accurate cutting method reduces the damage of the coating during cutting, avoids unnecessary breakage or tearing of the coating, thereby ensuring the integrity of the coating; 7. Compared with other shapes of blades, the V-shaped blade can better disperse stress during cutting, reducing the phenomenon of stress concentration, which helps to reduce the risk of breakage of the coating due to excessive stress during cutting. BRIEF DESCRIPTION OF DRAWINGS

[0025] The present application will be further described below in conjunction with the drawings and examples.

[0026] Figure 1 is a structural schematic diagram of the present application;

[0027] Figure 2 is a structural schematic diagram of another perspective of the present application;

[0028] Figure 3 is a top view of the present application;

[0029] Figure 4 is Figure 3Cross-sectional view along A-A;

[0030] Figure 5 is Figure 4 Enlarged view at C;

[0031] Figure 6 is Figure 4 Enlarged view at D;

[0032] Figure 7 is Figure 3 Cross-sectional view along B-B with the support column in the lowered state;

[0033] Figure 8 is Figure 3 Cross-sectional view along B-B with the support column in the raised state, the cutting blade in contact with the upper end face of the coated panel, in the immediate cutting state;

[0034] Figure 9 is a structural schematic view of the guide cylinder;

[0035] Figure 10 is a structural schematic view of the support column;

[0036] Figure 11 is a front view of the support column;

[0037] Figure 12 is Figure 11 Cross-sectional view along E-E;

[0038] Figure 13 is a schematic view of the rupture of the coating when the coated panel is punched in the conventional manner;

[0039] Figure 14 is a schematic view of the detachment of the coating from the substrate when the coated panel is punched in the conventional manner;

[0040] Figure 15 is a schematic view of the structure of the cutting blade when it shears the coating according to the application;

[0041] In the diagram: 1. Bracket; 2. Cutter; 3. Punch; 4. Coating; 5. Punch; 6. Pressing cylinder; 7. Support column; 8. Lifting cylinder; 9. Tool mounting plate; 10. Lifting frame; 11. Linear guide rail; 12. Pressure sleeve; 13. Tension spring; 14. Top column; 15. Support plate; 16. Drive block; 17. Guide cylinder; 18. Cover plate; 19. Linear bearing; 20. Connector; 21. Tool holder; 22. Substrate; 23. Coated plate; 24. Finished product. Positioning spring; 71, first guide surface; 72, inner groove; 73, support block; 101, top plate; 102, bottom plate; 103, support column; 104, guide post; 121, inner rounded end; 122, mounting sleeve; 123, telescopic rod; 141, column body; 142, groove; 143, ball bearing; 151, clearance hole; 161, second guide surface; 171, slot; 172, positioning block; 173, outer groove; 201, blade; 202, receiving cavity. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0043] like Figures 1-4 As shown, this invention discloses a two-stage punching device for maintaining coating continuity, used to process punches 3 in a coated plate 23. The coated plate 23 consists of a substrate 22 and a coating 4 covering one side of the substrate 22. The device includes a support 1, which has a top plate 101, a support plate 15, and a bottom plate 102 arranged horizontally from top to bottom at intervals. A support column 103 connects the support plate 15 and the bottom plate 102. The support column 103 consists of four square tubes, and their positions form a rectangle. A guide post 104 connects the support plate 15 and the top plate 101. Both ends of the guide post 104 have threaded sections with decreasing diameters, forming a shoulder at the root of the threaded section. The threaded section at the lower end of the guide post 104 is threaded to the support plate 15, and its shoulder abuts against the support plate 15. The threaded section at the upper end of the guide post 104 passes upward through the top plate 101 to the shoulder abutting against the lower end face of the top plate 101. The nut on the upper end face of the top plate 101 is threaded to the guide post 104, thereby fixing the guide post 104 and connecting the top plate 101 and the support plate 15. Two nuts are provided at the upper end of each guide post 104 to prevent the nuts from loosening.

[0044] The support plate 15 supports the coating plate 23. A clearance hole 151 is provided at its center, which is coaxial and of the same diameter as the punched hole 3 to be made on the coating plate 23. Four pressure plates are provided on the support plate 15, with their centers rotatably connected to the support plate 15 via a pivot. A bolt is provided at the end of the pressure plate furthest from the coating plate 23; this bolt is a handle bolt, with its threaded end passing downwards through the pressure plate and threadedly connected to the support plate 15, thus pressing and fixing the other end of the pressure plate against the coating plate 23.

[0045] The upper end surface of the top plate 101 is provided with a punch oil cylinder 6 with a driving end downward. A lifting frame 10 horizontally arranged is provided between the top plate 101 and the support plate 15, and four linear bearings 19 are fixedly connected to the lifting frame 10 and slidably connected to the guide columns 104, for guiding the lifting frame 10 to move up and down. The upper end surface of the lifting frame 10 is provided with a socket 20 fixedly connected by bolts. The socket 20 is threadedly connected to the piston rod of the punch oil cylinder 6, so that the punch oil cylinder 6 can drive the lifting frame 10 to move up and down. The lifting frame 10 includes a frame with a rectangular shape surrounded by square tubes, and a plurality of vertical and staggered reinforcing rods made of square tubes are arranged between the frames. The upper and lower ends of the frame are connected by a connecting plate, and the outer side of the connecting plate is flush with the outer side of the frame. In this way, the structural strength of the lifting frame 10 is improved, and deformation is avoided.

[0046] The lower side of the lifting frame 10 is provided with two symmetrical linear guides 11, and the sliding blocks of the linear guides 11 are fixedly connected to a tool mounting plate 9, so that the tool mounting plate 9 can move horizontally. The lower side of the tool mounting plate 9 is provided with two spaced-apart tool seats 21 fixedly connected by bolts. The tool seats 21 are provided with threaded holes and are respectively threadedly connected to a cutter 2 and a punch 5. The lower side of the lifting frame 10 is also provided with a horizontal driving assembly for driving the cutter 2 and the punch 5 to move alternately to the position opposite the punch hole 3. Moreover, when the cutter 2 works, the punch 5 will move to the outside of the support 1; when the punch 5 works, the cutter 2 will move to the outside of the support 1, so that the cutter 2 and the punch 5 can work stably and will not be blocked. The horizontal driving assembly can be, but is not limited to, a cylinder, and can also be a linear slide, an electric cylinder, etc. In the present embodiment, the horizontal driving assembly is a rodless cylinder. In this way, when the rodless cylinder drives the tool mounting plate 9 to move, the parts of the rodless cylinder will not protrude from the support 1, and can be effectively protected by the lifting frame 10, and damage is avoided.

[0047] The cutter 2 is in a cylindrical shape, and the lower end of the cutter 2 is provided with a concave trapezoidal accommodating cavity 202, so that the cutting edge 201 of the lower end of the cutter 2 forms a V-shaped structure, and the inner side of the cutting edge 201 forms an upwardly inclined slope, which is used to cut off the coating 4 at the punching hole 3. When the V-shaped cutting edge 201 cuts, the cut-off coating 4 will protrude upward, and the accommodating cavity 202 provides space for accommodating the protruding coating 4. Moreover, the upper end of the accommodating cavity 202 is further connected with a cylindrical cavity, which further expands the space for accommodating the bent coating 4, and does not block the cutting of the cutter 2. The V-shaped cutting edge 201 has the following advantages: 1. The V-shaped cutting edge 201 makes the cutting edge more sharp, and can accurately cut off the coating 4 before the punching hole 3. This accurate cutting method reduces the damage of the coating 4 during cutting, avoids unnecessary breakage or tearing of the coating 4, and thus ensures the integrity of the coating 4; 2. Compared with other shapes of cutting edges 201, the V-shaped cutting edge 201 can better disperse stress during cutting, and reduce the phenomenon of stress concentration, which helps to reduce the risk of breakage of the coating 4 due to excessive stress during cutting.

[0048] The upper end of the tool mounting plate 9 is provided with a top column 14; the top column 14 includes a column body 141, and the upper end of the column body 141 is provided with a semispherical, open, vertically upward recess 142; a same-diameter rolling ball 143 is installed in the recess 142, the rolling ball 143 can freely roll, and the upper end of the rolling ball 143 is in contact with the lifting frame 10. The recess 142 is designed in a semispherical shape, which not only facilitates the disassembly and assembly of the rolling ball 143, but also maximizes the contact area between the recess 142 and the rolling ball 143, so that the structure of the top column 14 is more stable. The lower end of the column body 141 is fixedly connected with the upper end surface of the tool mounting plate 9. The top column 14 is provided with four, two of which are located close to the cutter 2 and are symmetrically distributed relative to the axis of the cutter 2, and the remaining two are located close to the punch 5 and are symmetrically distributed relative to the axis of the punch 5. In this way, the top column 14 becomes a stress point, and the pressure is directly transmitted from the lifting frame 10 to the tool mounting plate 9, so that the linear guide rail 11 can be prevented from being damaged under pressure; moreover, the arrangement of the top column 14 makes the tool mounting plate 9 bear the force evenly, and the bending phenomenon does not occur. The arrangement of the rolling ball 143 enables the top column 14 to stably contact the lower end surface of the top column 14 again after the top column 14 is lifted off.

[0049] Since the coating 4 has ductility, during the cutting process of the cutter 2, the coating 4 will be stretched when the cutter 2 cuts downward, so the cutter 2 is provided with a cutter cover 6, which is in a cylindrical shape and is arranged on the cutter 2, and the cutter cover 6 is provided with a plurality of through holes 601, which are arranged in a staggered manner and are used to guide the coating 4 to stretch in a certain direction during the cutting process of the cutter 2. Figure 5As shown, a pressing sleeve 12 is sleeved on the outer side of the cutter 2, and the inner side wall of the pressing sleeve 12 is attached to the outer side wall of the cutter 2. The pressing sleeve 12 is elastically connected to the cutter mounting plate 9 by a tension spring 13, so that it can be displaced in the vertical direction. The specific structure is as follows: the two ends of the pressing sleeve 12 are provided with mounting sleeves 122, and the mounting sleeves 122 are provided with telescopic rods 123. The lower end of the inner rod of the telescopic rod 123 is provided with a shoulder, the lower end region of the shoulder is an external thread segment, the external thread segment passes through the bottom of the mounting sleeve 122 to the position where the shoulder abuts against the bottom of the mounting sleeve 122, and a nut is threadedly connected with the external thread segment to realize the mounting and fixing of the inner rod. The inner rod is of a solid structure, which is used to improve the strength of the telescopic rod 123. The upper end of the outer rod sleeved on the outer side of the inner rod is provided with a connecting flange, which is fixedly connected with the lower end face of the cutter mounting plate 9 under the action of bolt locking. The tension spring 13 is arranged in the telescopic rod 123, the lower end of the tension spring 13 abuts against the upper end of the inner rod, and the upper end of the tension spring 13 abuts against the lower end of the cutter mounting plate 9. The telescopic rod 123 automatically extends downward under the action of the gravity of the pressing sleeve 12, and extends downward beyond the cutter 2. At this time, the tension spring 13 is in a free state. When the cutter 2 is pressed downward for work, the pressing sleeve 12 first contacts the coating plate 23. When the cutter 2 continues to move downward, the tension spring 13 begins to contract and generates elastic force, so that the pressing sleeve 12 applies pressure to the coating plate 23 in the area outside the punching hole 3 under the action of its gravity and the elastic force of the tension spring 13. In this way, when the cutter 2 cuts downward, the coating 4 around the punching hole 3 is pressed tightly by the pressing sleeve 12, so that the stretching phenomenon does not occur.

[0050] The telescopic rod 123 is arranged so that when the pressing sleeve 12 moves towards the lifting frame 10, the telescopic rod 123 is always on the lower side of the cutter mounting plate 9. Compared with the traditional connecting mechanism of the pressing sleeve 12 and the tension spring 13 (a connecting shaft is arranged, the lower end of the connecting shaft is fixedly connected with the pressing sleeve 12, the upper end of the connecting shaft passes upward through the cutter mounting plate 9 and is locked by a nut; the tension spring 13 is sleeved on the connecting shaft, the upper end of the tension spring 13 abuts against the cutter mounting plate 9, and the lower end of the tension spring 13 abuts against the pressing sleeve 12; when the pressing sleeve 12 is blocked from descending, the connecting shaft will move upward), the space between the cutter mounting plate 9 and the lifting frame 10 is not occupied, not only the vertical space required for the connecting shaft to pass upward through the cutter mounting plate 9 is saved, but also sufficient mounting space for the top column 14 is provided.

[0051] Because the force receiving end face of the coating plate 23 is pressed and plastically deformed when the punch 5 is punched, a certain arc is generated on the upper end edge of the punching hole 3, forming an arc surface, and the arc surface is separated from the coating 4 and exposed to the outdoor environment and is easy to rust. Therefore, as shown in the figure, a pressing plate 24 is arranged on the outer side of the punching hole 3, and the pressing plate 24 is fixedly connected with the pressing sleeve 12. The pressing plate 24 is provided with a plurality of pressing grooves 241, and the pressing grooves 241 are arranged in the area corresponding to the punching hole 3. The pressing plate 24 is arranged on the outer side of the punching hole 3, so that the arc surface of the punching hole 3 is pressed by the pressing plate 24, and the arc surface is prevented from being separated from the coating 4 and exposed to the outdoor environment. Figure 15As shown, the lower end of the inner hole of the pressing sleeve 12 is provided with an inner chamfer 121. The setting of the inner chamfer 121 makes the coating 4 in the range of the inner chamfer 121 not be pressed by the pressing sleeve 12, and when the arc surface is formed, the coating 4 in the range of the inner chamfer 121 will follow the deformation and still adhere to the arc surface; and the range of the arc surface is smaller, and the deformation amplitude of the coating 4 is also smaller, and the phenomenon of breaking or separating from the substrate 22 will not occur.

[0052] A vertical support column 7 is arranged at the center position of the bottom plate 102 and is driven to lift by a lifting oil cylinder 8. The specific mounting structure is that a vertical guide cylinder 17 is arranged at the center position of the bottom plate 102, and the lower end of the guide cylinder 17 is provided with a radially protruding connecting plate which is fixedly connected with the bottom plate 102. The lower end of the connecting plate is further provided with a protruding positioning block 172 which is inserted into a positioning hole on the bottom plate 102 to realize mounting and positioning. The support column 7 is inserted into the guide cylinder 17 to realize lifting guidance.

[0053] As shown in the figure, Figure 9 The lower part of the guide cylinder 17 is provided with a U-shaped slot 171 with an opening downward, which divides the positioning block 172 into two parts in the shape of a segment of a circle. The positioning hole is also matched to be two parts in the shape of an arc, so that the part of the bottom plate 102 below the slot 171 constitutes a continuous structure.

[0054] The lifting oil cylinder 8 is mounted on the bottom plate 102. One side of the bottom plate 102 leads out a lug plate outward, and the lifting oil cylinder 8 is partially arranged on the lug plate to provide sufficient mounting space for the lifting oil cylinder 8. The lower end of the support column 7 is provided with a first guide surface 71 which is arranged obliquely relative to the horizontal plane; the driving end of the lifting oil cylinder 8 is connected with a driving block 16 which is inserted into the slot 171 to realize movement guidance. The driving block 16 is provided with a second guide surface 161 which has the same slope as the first guide surface 71; the part of the support column 7 which is provided with the first guide surface 71 has a radial projection in the shape of a right trapezoid; the driving block 16 is in the shape of a right trapezoid; when the driving block 16 moves toward the support column 7 and the first guide surface 71 and the second guide surface 161 are connected, the support column 7 rises; when the driving block 16 moves to the support column 7 and the first guide surface 71 and the second guide surface 161 are disconnected, the upper end surface of the driving block 16 is connected with the lower end surface of the support column 7, at this time, the upper end surface of the support column 7 is flush with the upper end surface of the supporting plate 15 to support the coating plate 23.

[0055] As shown in the figure, Figure 6 , Figures 10-12As shown, the inner wall of the guide cylinder 17 is provided with two vertically arranged circular-arc outer grooves 173, the lower end of the outer groove 173 penetrates the lower end of the guide cylinder 17, and the upper end of the outer groove 173 is spaced apart from the upper end of the guide cylinder 17. The outer wall of the support column 7 is provided with a recessed circular-arc inner groove 72, which is opposite to the outer groove 173 and spliced to form a placing groove. The lower end of the inner groove 72 is provided with a protruding support block 73, which is clamped in the outer groove 173, so as to limit the lifting of the support column 7 and prevent relative rotation. The reset spring 24 is arranged in the placing groove, and the upper end thereof abuts against the upper end of the outer groove 173, and the lower end thereof abuts against the support block 73. When the support column 7 rises, the reset spring 24 is compressed, and when the driving block 16 moves reversely, the support column 7 stably descends under the combined action of gravity and the elastic force of the reset spring 24.

[0056] The driving block 16 and the support column 7 are vertically arranged, which has the following advantages: 1. The vertical space required for the lifting oil cylinder 8 to drive the support column 7 to lift is reduced, thereby reducing the height of the present application and facilitating operation; 2. When the cutter 2 cuts downward, the pressure is sequentially transmitted to the coating plate 23, the support column 7, the driving block 16 and the bottom plate 102, so that the lifting oil cylinder 8 is not subjected to pressure, and the position of the support column 7 is stable.

[0057] The upper end surface of the guide cylinder 17 is inclined relative to the horizontal plane; the upper end surface of the guide cylinder 17 is further hinged with a cover plate 18; the cover plate 18 is provided as two symmetrically arranged plates, forming a double-door structure. A torsional spring is arranged on the hinge for hinging the cover plate 18 and the guide cylinder 17, for driving the cover plate 18 to close and plug the hole at the upper end of the guide cylinder 17. Moreover, the cover plate 18 is a flat plate, which is parallel or attached to the upper end surface of the guide cylinder 17 when closed, so that the cover plate 18 is also in an inclined state. In this way, the cut material falling will automatically fall to the outside of the guide cylinder 17 under the guiding action of the cover plate 18, thereby saving the process of manual cleaning and improving the production efficiency. Figure 8 As shown, when the support column 7 rises, the cover plate 18 will be opened by overcoming the elastic force of the torsional spring; as Figure 7 As shown, when the support column 7 descends, the support column 7 will be hidden in the guide cylinder 17, and will not block the closing of the cover plate 18.

[0058] Compared with the prior art, the advantages of the embodiment are: 1, the present application is provided with a cylindrical cutter 2, which cuts the coating 4 at the punching 3 before punching 3; in this way, when the punch 5 is punched, the coating 4 is already in a cut state and will not break due to stress concentration during the blanking process, thereby effectively solving the problem of coating 4 breakage in the traditional punching 3 process; 2, after the cutter 2 cuts the coating 4, the punch 5 punches again, avoiding the phenomenon that the coating 4 separates from the base material due to rapid shrinkage during the blanking process; 3, since the cutter 2 cuts, it will form a downward pressure on the coating plate 23, so the support column 7 supports the coating plate 23 when the cutter 2 cuts, thereby avoiding the phenomenon that the coating plate 23 is concave downward when cutting; 4, the cutter 2 and the punch 5 work alternately under the action of the horizontal driving assembly, avoiding the process of alternately disassembling the cutter 2 and the punch 5, making the punching 3 process more efficient and stable; 5, the hole diameter of the avoiding hole 151 is set to be consistent with the hole diameter of the punching 3, so that when the punch 5 is blanked, the part around the punching 3 will not be concave downward, keeping the structure of the coating plate 23 stable.

[0059] Based on the above ideal embodiments according to the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the contents of the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A two-stage punching device for maintaining coating continuity, used for punching (3) holes in a coated plate (23), the coated plate (23) comprising a substrate (22) and a coating (4) covering one side of the substrate (22), characterized in that, Includes a bracket (1), on which are provided: The cutter (2) is cylindrical and has a recessed receiving cavity (202) at its lower end, so that the blade (201) at the lower end of the cutter (2) forms a V-shape and the inner side of the blade (201) forms an upward inclined surface, which is used to cut the coating (4) at the punch (3). Punch (5) is used to punch the coating plate (23) that has been cut off from the coating (4), so that the punch (3) is formed; A hydraulic cylinder (6) is used to drive the cutter (2) and punch (5) to rise and fall; When the cutter (2) cuts, it will exert downward pressure on the coated plate (23); A conversion component is used to drive the cutter (2) and punch (5) to move so that they alternately face the position of the punch (3); The pallet (15) is arranged horizontally and located below the cutter (2). The pallet (15) has a clearance hole (151) with the same diameter and coaxiality as the punch (3). The support column (7) is located below the pallet (15) and is driven to rise and fall by the lifting cylinder (8); when the cutter (2) is working, the upper end of the support column (7) is inserted into the clearance hole (151) and the upper end face of the support column (7) is flush with the upper end face of the pallet (15); when the punch (5) is working, the support column (7) is away from the coating plate (23). The conversion assembly includes a horizontally arranged tool mounting plate (9); A top post (14) is provided at the upper end of the tool mounting plate (9). The lower end of the top column (14) is fixedly connected to the upper end face of the tool mounting plate (9), and the upper end is in contact with the lower end face of the lifting frame (10).

2. The two-stage punching device for maintaining coating continuity according to claim 1, characterized in that: The cutter (2) and punch (5) are both mounted on the underside of the cutter mounting plate (9); The bracket (1) is provided with a lifting frame (10) that is driven to lift by a stamping cylinder (6), and a linear guide rail (11) is installed on the lower side of the lifting frame (10). The upper end face of the tool mounting plate (9) is fixedly connected to the slider in the linear guide rail (11); The tool mounting plate (9) is driven to move by a horizontal drive assembly.

3. The two-stage punching device for maintaining coating continuity according to claim 2, characterized in that: A pressure sleeve (12) is sleeved on the outer side of the cutter (2), and the inner sidewall of the pressure sleeve (12) is in contact with the outer sidewall of the cutter (2); The pressure sleeve (12) is elastically connected to the tool mounting plate (9) through a tension spring (13), allowing it to move in the vertical direction; When the cutter (2) cuts the coating plate (23), pressure is generated between the pressure sleeve (12) and the coating plate (23).

4. The two-stage punching device for maintaining coating continuity according to claim 3, characterized in that: The lower end of the inner hole of the pressure sleeve (12) is provided with an inner chamfer (121).

5. The two-stage punching device for maintaining coating continuity according to claim 3, characterized in that: The outer wall of the pressure sleeve (12) is provided with two symmetrical, vertically arranged, upward-facing mounting sleeves (122), and a telescopic rod (123) is provided inside the mounting sleeve (122). The lower end of the telescopic rod (123) is fixedly connected to the bottom of the mounting sleeve (122), and the upper end is fixedly connected to the tool mounting plate (9); The tension spring (13) is disposed inside the telescopic rod (123).

6. The two-stage punching device for maintaining coating continuity according to claim 5, characterized in that: The top post (14) is set to four, two of which are close to the cutter (2) and are symmetrically distributed with respect to the axis of the cutter (2); the remaining two are close to the punch (5) and are symmetrically distributed with respect to the axis of the punch (5).

7. A two-stage punching device for maintaining coating continuity according to claim 6, characterized in that: The top column (14) includes a column body (141), and the upper end of the column body (141) is provided with a hemispherical groove (142) with the opening facing vertically upward. A ball (143) of the same diameter is installed in the groove (142). The upper end of the ball (143) is in contact with the lifting frame (10).

8. The two-stage punching device for maintaining coating continuity according to claim 1, characterized in that: The lower end of the support column (7) is provided with a first guide surface (71) that is inclined relative to the horizontal plane. The lifting cylinder (8) is arranged horizontally, and its driving end is connected to a driving block (16). The driving block (16) is provided with a second guiding surface (161) with the same slope as the first guiding surface (71). The portion of the support column (7) with a first guide surface (71) has a radial projection that is a right trapezoid. The drive block (16) is in the shape of a right trapezoid; When the drive block (16) moves toward the support column (7) and the first guide surface (71) and the second guide surface (161) are connected, the support column (7) rises. When the drive block (16) moves toward the support column (7) and moves to the point where it disengages from the first guide surface (71) and the second guide surface (161), the upper end face of the drive block (16) connects with the lower end face of the support column (7), and at this time the upper end face of the support column (7) is flush with the upper end face of the tray (15).

9. A two-stage punching device for maintaining coating continuity according to claim 8, characterized in that: The lower end of the bracket (1) is provided with a vertically arranged guide cylinder (17), and the support column (7) is inserted into the guide cylinder (17); The lower part of the guide tube (17) is provided with a U-shaped slot (171) with the opening facing downward. The drive block (16) is inserted into the slot (171).

10. A two-stage punching device for maintaining coating continuity according to claim 9, characterized in that: The upper end face of the guide cylinder (17) is arranged at an angle relative to the horizontal plane; The upper end face of the guide cylinder (17) is also hinged with a cover plate (18). By rotating the cover plate (18), the cover plate (18) can block or open the upper end face of the guide cylinder (17); When the cover plate (18) is closed and the upper end face of the guide cylinder (17) is blocked, the cover plate (18) is also arranged at an angle.

Images